umls-concept:C0042600 | skos:definition | MSH: The four cellular masses in the floor of the fourth ventricle giving rise to a widely dispersed special sensory system. Included is the superior, medial, inferior, and LATERAL VESTIBULAR NUCLEUS. (From Dorland, 27th ed),CSP: four cellular masses in the floor of the fourth ventricle giving rise to a widely dispersed special sensory system. | lld:umls |